Title:
METHOD FOR CONSTRUCTION OF PIERS IN SOIL AND A PIER CONSTRUCTION
Document Type and Number:
WIPO Patent Application WO2004053237
Kind Code:
A3
Abstract:
Apparatus and an associated method for forming a pier in a soil matrix (28) includes a hollow tube (38) with a restricted expansion section (20) connected to and adjacent a soil penetrating bottom head element (22) which is configured to facilitate discharge of pier forming material such as grout. An expansion device (26) in the form of an expandable bladder or expandable mechanical device is positioned along a section of the length of the restricted expansion section (20). The hollow tube structure is inserted into a soil matrix with the expansion device in the retracted condition. Subsequently, the expansion device is expanded to enlarge the formed cavity in the soil matrix. Then grout or other pier forming material is injected into the cavity as the expansion device is retracted or deflated and as the hollow tube structure is raised incrementally to form a pier with one or more uniquely shaped lifts.
Inventors:
FOX NATHANIEL S (US)
Application Number:
PCT/US2003/038766
Publication Date:
April 14, 2005
Filing Date:
December 05, 2003
Export Citation:
Assignee:
GEOTECHNICAL REINFORCEMENT INC (US)
FOX NATHANIEL S (US)
FOX NATHANIEL S (US)
International Classes:
E02D5/44; E02D5/46; (IPC1-7): E02D5/44
Foreign References:
| JPS563714A | 1981-01-16 | |||
| US4547106A | 1985-10-15 | |||
| US3479829A | 1969-11-25 | |||
| US5256004A | 1993-10-26 | |||
| US1443306A | 1923-01-23 | |||
| US5219249A | 1993-06-15 | |||
| US5549168A | 1996-08-27 |
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